Vector illustration – Whistling. Created with adobe illustrator. Whistling Creativity Singing Whistling
Wood engraving of whistling swan. Illustrated Natural History by Rev. J. G. Wood, published in USA in 1882. See similar engravings in my lightbox: natural history 1882 Engraving 1880-1889 Print Whistling swan
Police officer in uniform blowing whistle shown with and without sunglasses Human Ear Human Eye Human Hand Whistling Policeman